/* ============================================
   CSS Variables - Pinterest-Inspired Palette
   ============================================ */
:root {
    /* Colors */
    --color-beige: #F5F1EB;
    --color-off-white: #FAF9F6;
    --color-sage: #A8B5A0;
    --color-warm-grey: #D4C4B8;
    --color-dark-grey: #5A5A5A;
    --color-text: #3A3A3A;
    --color-text-light: #6B6B6B;
    --color-accent: #C4A484;
    
    /* Typography */
    --font-serif: 'Georgia', 'Times New Roman', serif;
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    
    /* Transitions */
    --transition-smooth: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.2s ease;
}

/* ============================================
   Reset & Base Styles
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
    overflow-x: hidden;
    /* Prevent horizontal scroll from 100vw / off-screen elements on mobile */
    width: 100%;
    max-width: 100vw;
}

body {
    font-family: var(--font-sans);
    color: var(--color-text);
    background-color: var(--color-off-white);
    line-height: 1.7;
    overflow-x: hidden;
    width: 100%;
    max-width: 100%;
    position: relative;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
}

/* ============================================
   Navigation
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(250, 249, 246, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: var(--spacing-sm) 0;
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-text {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--color-text);
    letter-spacing: 0.5px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-md);
}

.nav-link {
    font-size: 0.95rem;
    color: var(--color-text-light);
    padding: var(--spacing-xs) 0;
    position: relative;
    transition: var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-text);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: var(--transition-fast);
}

.nav-link:hover::after {
    width: 100%;
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition-fast);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    position: relative;
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
    background: linear-gradient(135deg, var(--color-beige) 0%, var(--color-off-white) 100%);
}

#three-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: 0 var(--spacing-md);
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(2.5rem, 8vw, 5rem);
    font-weight: 400;
    color: var(--color-text);
    margin-bottom: var(--spacing-sm);
    letter-spacing: 2px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: clamp(1rem, 2vw, 1.25rem);
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    font-weight: 300;
    letter-spacing: 1px;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    padding: 1rem 2.5rem;
    font-size: 1rem;
    border-radius: 50px;
    transition: var(--transition-smooth);
    font-weight: 500;
    letter-spacing: 0.5px;
}

.btn-primary {
    background: var(--color-text);
    color: var(--color-off-white);
}

.btn-primary:hover {
    background: var(--color-dark-grey);
    transform: translateY(-2px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text);
    border: 2px solid var(--color-text);
}

.btn-secondary:hover {
    background: var(--color-text);
    color: var(--color-off-white);
    transform: translateY(-2px);
}

.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
}

.mouse {
    width: 24px;
    height: 40px;
    border: 2px solid var(--color-text-light);
    border-radius: 15px;
    position: relative;
}

.mouse::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--color-text-light);
    border-radius: 2px;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0%, 100% { opacity: 1; transform: translateX(-50%) translateY(0); }
    50% { opacity: 0.5; transform: translateX(-50%) translateY(10px); }
}

/* ============================================
   Container & Sections
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

section {
    padding: var(--spacing-xl) 0;
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 5vw, 3rem);
    text-align: center;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
    font-weight: 400;
    letter-spacing: 1px;
}

.section-subtitle {
    text-align: center;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
    font-size: 1.1rem;
    font-weight: 300;
}

/* ============================================
   About Section
   ============================================ */
.about {
    background: var(--color-off-white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.about-image {
    display: flex;
    justify-content: center;
}

.portrait-placeholder {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: var(--color-warm-grey);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-text-light);
    font-size: 0.9rem;
    border: 8px solid var(--color-beige);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.profile-photo {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    object-fit: cover;
    border: 8px solid var(--color-beige);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    display: block;
}

.about-text {
    padding-left: var(--spacing-md);
}

.about-intro {
    font-size: 1.1rem;
    line-height: 1.8;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-lg);
}

.about-stats {
    display: flex;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-md) 0;
    border-top: 1px solid var(--color-warm-grey);
    border-bottom: 1px solid var(--color-warm-grey);
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--color-text);
    line-height: 1;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--color-text-light);
    margin-top: var(--spacing-xs);
}

.about-specializations h3 {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.about-specializations ul {
    list-style: none;
    padding-left: 0;
}

.about-specializations li {
    padding: var(--spacing-xs) 0;
    color: var(--color-text-light);
    position: relative;
    padding-left: var(--spacing-md);
}

.about-specializations li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-sage);
}

/* ============================================
   Portfolio Section
   ============================================ */
.portfolio {
    background: var(--color-beige);
}

.portfolio-filters {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.filter-btn {
    padding: 0.7rem 1.5rem;
    background: transparent;
    border: 1px solid var(--color-warm-grey);
    color: var(--color-text-light);
    border-radius: 25px;
    font-size: 0.95rem;
    transition: var(--transition-smooth);
    cursor: pointer;
}

.filter-btn:hover {
    border-color: var(--color-text);
    color: var(--color-text);
}

.filter-btn.active {
    background: var(--color-text);
    color: var(--color-off-white);
    border-color: var(--color-text);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--spacing-md);
    grid-auto-rows: 10px;
}

.portfolio-item {
    position: relative;
    overflow: hidden;
    border-radius: 8px;
    cursor: pointer;
    background: var(--color-off-white);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    transition: var(--transition-smooth);
    grid-row-end: span var(--row-span, 30);
}

.portfolio-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

.portfolio-image {
    width: 100%;
    height: 100%;
    overflow: hidden;
}

.image-placeholder {
    width: 100%;
    height: 300px;
    background: linear-gradient(135deg, var(--color-warm-grey) 0%, var(--color-sage) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-off-white);
    font-size: 0.9rem;
    opacity: 0.7;
}

.portfolio-item[data-category="2d-floor-plans"] .image-placeholder {
    height: 400px;
}

.portfolio-item[data-category="3d-floor-plans"] .image-placeholder {
    height: 350px;
}

.portfolio-item[data-category="projects"] .image-placeholder {
    height: 300px;
}

.portfolio-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    padding: var(--spacing-md);
    transform: translateY(100%);
    transition: var(--transition-smooth);
}

.portfolio-item:hover .portfolio-overlay {
    transform: translateY(0);
}

.portfolio-title {
    color: var(--color-off-white);
    font-family: var(--font-serif);
    font-size: 1.3rem;
    margin-bottom: var(--spacing-xs);
}

.portfolio-description {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-sm);
}

.portfolio-view {
    padding: 0.5rem 1.2rem;
    background: var(--color-off-white);
    color: var(--color-text);
    border-radius: 20px;
    font-size: 0.85rem;
    transition: var(--transition-fast);
}

.portfolio-view:hover {
    background: var(--color-accent);
    color: var(--color-off-white);
}

/* ============================================
   Lightbox
   ============================================ */
.lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-md);
}

.lightbox.active {
    display: flex;
}

.lightbox-close {
    position: absolute;
    top: 30px;
    right: 30px;
    font-size: 3rem;
    color: var(--color-off-white);
    cursor: pointer;
    line-height: 1;
    transition: var(--transition-fast);
}

.lightbox-close:hover {
    transform: rotate(90deg);
}

.lightbox-content {
    max-width: 90%;
    max-height: 90%;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

#lightbox-image {
    max-width: 100%;
    max-height: 70vh;
    object-fit: contain;
    border-radius: 8px;
}

.lightbox-info {
    text-align: center;
    color: var(--color-off-white);
}

.lightbox-info h3 {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    margin-bottom: var(--spacing-xs);
}

.lightbox-info p {
    color: rgba(255, 255, 255, 0.8);
}

/* ============================================
   Experience / Timeline
   ============================================ */
.experience {
    background: var(--color-off-white);
}

.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-lg) 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-warm-grey);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-lg);
    display: flex;
    align-items: center;
}

.timeline-item:nth-child(odd) {
    flex-direction: row;
}

.timeline-item:nth-child(even) {
    flex-direction: row-reverse;
}

.timeline-marker {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--color-text);
    border: 4px solid var(--color-off-white);
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    z-index: 2;
    box-shadow: 0 0 0 4px var(--color-warm-grey);
}

.timeline-content {
    width: 45%;
    padding: var(--spacing-md);
    background: var(--color-beige);
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
}

.timeline-date {
    display: block;
    font-size: 0.85rem;
    color: var(--color-sage);
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    letter-spacing: 0.5px;
}

.timeline-content h3 {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.timeline-content p {
    color: var(--color-text-light);
    line-height: 1.7;
}

/* ============================================
   Skills Section
   ============================================ */
.skills {
    background: var(--color-beige);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    max-width: 1000px;
    margin: 0 auto;
}

.skill-item {
    text-align: center;
    padding: var(--spacing-lg);
    background: var(--color-off-white);
    border-radius: 8px;
    transition: var(--transition-smooth);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.skill-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.skill-icon {
    margin: 0 auto var(--spacing-sm);
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-beige);
    color: var(--color-dark-grey);
    border-radius: 50%;
    transition: var(--transition-smooth);
    border: 1px solid var(--color-warm-grey);
}

.skill-item:hover .skill-icon {
    color: var(--color-sage);
    background: rgba(168, 181, 160, 0.2);
    border-color: var(--color-sage);
}

.skill-icon .bi {
    font-size: 1.6rem;
    display: block;
}

.skill-item h3 {
    font-family: var(--font-serif);
    font-size: 1.2rem;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text);
}

.skill-item p {
    font-size: 0.9rem;
    color: var(--color-text-light);
}

/* ============================================
   Testimonials
   ============================================ */
.testimonials {
    background: var(--color-off-white);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-md);
    max-width: 1200px;
    margin: 0 auto;
}

.testimonial-card {
    background: var(--color-beige);
    padding: var(--spacing-lg);
    border-radius: 8px;
    position: relative;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.08);
    transition: var(--transition-smooth);
}

.testimonial-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12);
}

.testimonial-quote {
    font-family: var(--font-serif);
    font-size: 4rem;
    color: var(--color-sage);
    line-height: 1;
    opacity: 0.3;
    margin-bottom: var(--spacing-sm);
}

.testimonial-text {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--color-text-light);
    margin-bottom: var(--spacing-md);
    font-style: italic;
}

.testimonial-author {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.testimonial-author strong {
    color: var(--color-text);
    font-size: 1rem;
}

.testimonial-author span {
    color: var(--color-text-light);
    font-size: 0.85rem;
}

/* ============================================
   Contact Section
   ============================================ */
.contact {
    background: var(--color-beige);
}

.contact-content {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    position: relative;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--color-warm-grey);
    border-radius: 8px;
    background: var(--color-off-white);
    font-family: inherit;
    font-size: 1rem;
    color: var(--color-text);
    transition: var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-text);
    box-shadow: 0 0 0 3px rgba(58, 58, 58, 0.1);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-status {
    font-size: 0.95rem;
    margin-top: 0.25rem;
    min-height: 1.4em;
}

.form-status--success {
    color: var(--color-sage);
}

.form-status--error {
    color: var(--color-dark-grey);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    padding: var(--spacing-md);
}

.contact-item h3 {
    font-family: var(--font-serif);
    font-size: 1.3rem;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.contact-item p {
    color: var(--color-text-light);
    font-size: 1rem;
}

.social-links {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.social-link {
    padding: 0.7rem 0;
    color: var(--color-text-light);
    border-bottom: 1px solid transparent;
    transition: var(--transition-fast);
    display: inline-block;
    width: fit-content;
}

.social-link:hover {
    color: var(--color-text);
    border-bottom-color: var(--color-text);
}

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--color-text);
    color: var(--color-off-white);
    text-align: center;
    padding: var(--spacing-md) 0;
    font-size: 0.9rem;
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 968px) {
    .nav-menu {
        position: fixed;
        left: 0;
        top: 70px;
        transform: translateX(-100%);
        flex-direction: column;
        background: var(--color-off-white);
        width: 100%;
        max-width: 100vw;
        text-align: center;
        transition: transform var(--transition-smooth);
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: var(--spacing-md) 0;
        /* Prevent off-screen menu from extending document width on mobile */
        will-change: transform;
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .hamburger {
        display: flex;
    }

    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .about-text {
        padding-left: 0;
    }

    .about-stats {
        justify-content: center;
    }

    .portfolio-grid {
        grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    }

    .timeline::before {
        left: 20px;
    }

    .timeline-item {
        flex-direction: row !important;
        padding-left: 50px;
    }

    .timeline-marker {
        left: 20px;
    }

    .timeline-content {
        width: 100%;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }

    .skills-grid {
        grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    }
}

@media (max-width: 640px) {
    :root {
        --spacing-xl: 3rem;
        --spacing-lg: 2rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        width: 100%;
    }

    .portfolio-grid {
        grid-template-columns: 1fr;
    }

    .about-stats {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }

    .testimonials-grid {
        grid-template-columns: 1fr;
    }

    .skills-grid {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   Animation Classes (for GSAP)
   ============================================ */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
}

.slide-in-left {
    opacity: 0;
    transform: translateX(-50px);
}

.slide-in-right {
    opacity: 0;
    transform: translateX(50px);
}